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Workshop Note: Immobiliser C.2016........... #538505
21/10/18 01:38 PM
21/10/18 01:38 PM
Joined: Dec 2008
Posts: 17,936
South Yorkshire
DaveW Offline OP
Roadster Guru
DaveW  Offline OP
Roadster Guru
Member of the Inner Circle

Joined: Dec 2008
Posts: 17,936
South Yorkshire
Last Wednesday I went to start the Plus 4 and the immobiliser light didn't go off when I clicked the ignition on. I knew the battery could do with a charge, so I charged it up overnight. The following day it started normally so I put this down to voltage sensitivity.

Yesterday, I wanted to fill the tank,so jumped in expecting a start, and the immobiliser light didn't go out.

So I removed the cowl to examine the sensor ring which surrounds the ignition lock barrel. This ring has a scientific name but rather than guess I'll call it the sensor ring. It detects the sensor which is buried inside the plastic part of the key. If you look carefully on the metal key side of the black plastic the location of the key sensor is visible as a filled hole.

The sensor ring around the lock barrel is secured by a neoprene spacer. Almost like I've been there before! I moved the sensor ring outwards, and the car started. It was a bit nail biting at the filling station but it started OK.

When we got back home I tried again and it wouldn't start............ frown2

So I consulted my Guru..........

The distance between the key and the detector ring is critical to probably within 1mm or less.

He's had a couple of Morgans in recently in the "18 months old to two years old range" with this issue.

The trick is to get the detector ring as close as possible to the key handle...............

This is how it comes from the Factory. The lock barrel is wrapped with standard density self adhesive neoprene. Around that to prevent the ring slipping inwards is a thin strip of neoprene. If your cowl is leather wrapped, the leather adds additional distance between the ring and key.



The next image is a bit clearer. The wiring from the sensor is a bit tight, but can be eased out from the cable tie buried under the dashboard.



The black plastic cover pulls off the lock barrel which makes removing the original neoprene much easier.........
The detector ring is upper left.



This is the DW solution. High density neoprene and with the securing ring held with a cable tie.
Refitting the cowl is tedious. I reduced the overlap of leather to try and reduce the thickness around the lock barrel. First time didn't work so I had to go back in and space the ring a little further out at the top.



If you ever get caught where the immobiliser light won't go out, wipe the black plastic part of the key around the lock barrel, and you'll have about twenty seconds to insert the key and start the engine after the light goes out!!!

Three starts later it looks promising, but who knows!! thumbs


DaveW
2005 Corsa Red Roadster S1
2016 Saffron Yellow (Narrow) Plus 4
Re: Workshop Note: Immobiliser C.2016........... [Re: DaveW] #538511
21/10/18 02:48 PM
21/10/18 02:48 PM
Joined: Mar 2015
Posts: 201
Perthshire Scotland
jimmyw Offline
L - Learner Plates On
jimmyw  Offline
L - Learner Plates On

Joined: Mar 2015
Posts: 201
Perthshire Scotland
This problem could occur on a 4/4 and because the warning light is not visible diagnosing the non starting would be difficult .


Jimmy
2015 4/4 Sport Green
Re: Workshop Note: Immobiliser C.2016........... [Re: DaveW] #538513
21/10/18 03:10 PM
21/10/18 03:10 PM
Joined: Apr 2014
Posts: 3,120
Dorset, UK
milligoon Offline
Talk Morgan Addict
milligoon  Offline
Talk Morgan Addict

Joined: Apr 2014
Posts: 3,120
Dorset, UK
Can't recall having such distance critical issues after having it apart several times in the roadster when I was chasing a sluggish starting issue (key wiring to relay) are they different? Only have the naked plastic cowling in mine though.


Mark - No Longer driving
Archie the Old English Sheep Mog...........
2010 Roadster 3.0 V6 (S3) wink
Re: Workshop Note: Immobiliser C.2016........... [Re: jimmyw] #538517
21/10/18 03:26 PM
21/10/18 03:26 PM
Joined: Dec 2008
Posts: 17,936
South Yorkshire
DaveW Offline OP
Roadster Guru
DaveW  Offline OP
Roadster Guru
Member of the Inner Circle

Joined: Dec 2008
Posts: 17,936
South Yorkshire
Originally Posted By jimmyw
This problem could occur on a 4/4 and because the warning light is not visible diagnosing the non starting would be difficult .


At least the starter doesn't turn, the immobiliser is almost too good!


DaveW
2005 Corsa Red Roadster S1
2016 Saffron Yellow (Narrow) Plus 4
Re: Workshop Note: Immobiliser C.2016........... [Re: DaveW] #538534
21/10/18 06:54 PM
21/10/18 06:54 PM
Joined: May 2009
Posts: 183
Durham, UK
S
smudger1 Offline
L - Learner Plates On
smudger1  Offline
L - Learner Plates On
S

Joined: May 2009
Posts: 183
Durham, UK
I had a similar problem which proved to be dry soldered joints in the spider unit behind the dash.


1999 Morgan Plus 8. 3.9 ....
1961 Alvis TD21 Series1 3 Litre Auto....
Re: Workshop Note: Immobiliser C.2016........... [Re: DaveW] #538542
21/10/18 07:58 PM
21/10/18 07:58 PM
Joined: Oct 2017
Posts: 39
B
Biglewey Offline
Just Getting Started
Biglewey  Offline
Just Getting Started
B

Joined: Oct 2017
Posts: 39
Had similar problem with my 2015 plus 4. No warning light but just would not start. Not wanting to bugger things up took to dealer who knew it could be an issue. Sorted it and not been a problem since. He said coil location had to be just right.

Last edited by Biglewey; 21/10/18 07:59 PM.
Re: Workshop Note: Immobiliser C.2016........... [Re: DaveW] #538601
22/10/18 11:19 AM
22/10/18 11:19 AM
Joined: May 2018
Posts: 114
Angus, UK
B
Bervie1 Offline
L - Learner Plates On
Bervie1  Offline
L - Learner Plates On
B

Joined: May 2018
Posts: 114
Angus, UK
“So I consulted my Guru..........”

You mean there is a higher grade of Guru than DaveW!!!

Re: Workshop Note: Immobiliser C.2016........... [Re: Bervie1] #538608
22/10/18 12:36 PM
22/10/18 12:36 PM
Joined: Dec 2008
Posts: 17,936
South Yorkshire
DaveW Offline OP
Roadster Guru
DaveW  Offline OP
Roadster Guru
Member of the Inner Circle

Joined: Dec 2008
Posts: 17,936
South Yorkshire
Originally Posted By Bervie1
“So I consulted my Guru..........”

You mean there is a higher grade of Guru than DaveW!!!


Indeed there is! The trick is knowing who will know!!!!
guru


DaveW
2005 Corsa Red Roadster S1
2016 Saffron Yellow (Narrow) Plus 4
Re: Workshop Note: Immobiliser C.2016........... [Re: DaveW] #538621
22/10/18 02:34 PM
22/10/18 02:34 PM
Joined: Aug 2014
Posts: 505
Northern Germany
B
bmgermany Offline
Talk Morgan Regular
bmgermany  Offline
Talk Morgan Regular
B

Joined: Aug 2014
Posts: 505
Northern Germany
Originally Posted By DaveW
Originally Posted By Bervie1
“So I consulted my Guru..........”

You mean there is a higher grade of Guru than DaveW!!!


Indeed there is! The trick is knowing who will know!!!!
guru
.

I don' have to know everything - to know whom I can ask is enough!


2005 1800ccm 4/4 and a lot of HONDA CX500.......
Re: Workshop Note: Immobiliser C.2016........... [Re: DaveW] #538623
22/10/18 03:04 PM
22/10/18 03:04 PM
Joined: Jun 2014
Posts: 10,893
Lancashire, England
Stewart S Offline
Wave & smile... It's a Morgan
Stewart S  Offline
Wave & smile... It's a Morgan
Member of the Inner Circle

Joined: Jun 2014
Posts: 10,893
Lancashire, England
How annoying
I know of two Mog owners just recently that have had problems with not starting down to the immobiliser


2008 Bugatti Blue Roadster 4 Seater
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